Hmmm, well mine does, but then I mapped it all out in AC3D from the beginning
http://www.youtube.com/watch?v=dYhGeWt5JUM
As I said I am a beginner, what I seem to be getting is that you want to select the surfaces and manipulate that mapping to the texture you already have? I did it the other way around manipulating the texture to fit the UV map.
Perhaps you could try this, map some surfaces and then from the object menu load the texture file you have and then save the whole thing and re open it
The image will likely be in all the wrong places but then perhaps the whole image will show in the TCE after you select one of the surfaces and you can remap the surfaces and resize and move/rotate them around to fit the image.
P.S. not sure of all the texture files AC3D supports. I use .bmps just because that's what my game requires. I don't know about PDF.